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[OptionsResolver] Support union of types #20537

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[OptionsResolver] Support union of types #20537

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10 changes: 8 additions & 2 deletions components/options_resolver.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -304,11 +304,13 @@ correctly. To validate the types of the options, call
$resolver->setAllowedTypes('host', 'string');

// specify multiple allowed types
$resolver->setAllowedTypes('port', ['null', 'int']);
$resolver->setAllowedTypes('port', ['int', 'null']);
$resolver->setAllowedTypes('port', 'int|null');

// check all items in an array recursively for a type
$resolver->setAllowedTypes('dates', 'DateTime[]');
$resolver->setAllowedTypes('ports', 'int[]');
$resolver->setAllowedTypes('dates', 'DateTime[]');
$resolver->setAllowedTypes('dates', '(DateTime|DateTimeImmutable)[]');
}
}

Expand All @@ -331,6 +333,10 @@ is thrown::
In sub-classes, you can use :method:`Symfony\\Component\\OptionsResolver\\OptionsResolver::addAllowedTypes`
to add additional allowed types without erasing the ones already set.

.. versionadded:: 7.3

The support of union types was introduced in Symfony 7.3.

.. _optionsresolver-validate-value:

Value Validation
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